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Mathematics 10 Online
OpenStudy (anonymous):

a ball is thrown downward from the top of a 140-foot building with an initial velocity of 17 feet per second. The height of the ball h after t seconds is given by the equation h= -16t^2 - 17t + 140. How long after the ball is thrown will it strike the ground?

OpenStudy (zale101):

plug this 0= -16t^2 - 17t + 140 in quadratic formula

OpenStudy (zale101):

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